brcm2708: update to latest patches from RPi foundation

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch b/target/linux/brcm2708/patches-4.19/950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch
new file mode 100644 (file)
index 0000000..d2a9973
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0361-dwc_otg-only-do_split-when-we-actually-need-to-do-a-.patch
@@ -0,0 +1,55 @@
+From 0c988aed71773be4481b886ccf03c40a52f57cdb Mon Sep 17 00:00:00 2001
+From: P33M <p33m@github.com>
+Date: Mon, 8 Apr 2019 12:45:23 +0100
+Subject: [PATCH] dwc_otg: only do_split when we actually need to do a
+ split
+
+The previous test would fail if the root port was in fullspeed mode
+and there was a hub between the FS device and the root port. While
+the transfer worked, the schedule mangling performed for high-speed
+split transfers would break leading to an 8ms polling interval.
+---
+ drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c | 9 ++++-----
+ 1 file changed, 4 insertions(+), 5 deletions(-)
+
+--- a/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
++++ b/drivers/usb/host/dwc_otg/dwc_otg_hcd_queue.c
+@@ -167,8 +167,10 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot
+       char *speed, *type;
+       int dev_speed;
+       uint32_t hub_addr, hub_port;
++      hprt0_data_t hprt;
+ 
+       dwc_memset(qh, 0, sizeof(dwc_otg_qh_t));
++      hprt.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0);
+ 
+       /* Initialize QH */
+       qh->ep_type = dwc_otg_hcd_get_pipe_type(&urb->pipe_info);
+@@ -191,9 +193,8 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot
+ 
+       qh->nak_frame = 0xffff;
+ 
+-      if (((dev_speed == USB_SPEED_LOW) ||
+-           (dev_speed == USB_SPEED_FULL)) &&
+-          (hub_addr != 0 && hub_addr != 1)) {
++      if (hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED &&
++                      dev_speed != USB_SPEED_HIGH) {
+               DWC_DEBUGPL(DBG_HCD,
+                           "QH init: EP %d: TT found at hub addr %d, for port %d\n",
+                           dwc_otg_hcd_get_ep_num(&urb->pipe_info), hub_addr,
+@@ -204,7 +205,6 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot
+ 
+       if (qh->ep_type == UE_INTERRUPT || qh->ep_type == UE_ISOCHRONOUS) {
+               /* Compute scheduling parameters once and save them. */
+-              hprt0_data_t hprt;
+ 
+               /** @todo Account for split transfers in the bus time. */
+               int bytecount =
+@@ -219,7 +219,6 @@ void qh_init(dwc_otg_hcd_t * hcd, dwc_ot
+                                                   SCHEDULE_SLOP);
+               qh->interval = urb->interval;
+ 
+-              hprt.d32 = DWC_READ_REG32(hcd->core_if->host_if->hprt0);
+               if (hprt.b.prtspd == DWC_HPRT0_PRTSPD_HIGH_SPEED) {
+                       if (dev_speed == USB_SPEED_LOW ||
+                                       dev_speed == USB_SPEED_FULL) {